Two events AAA and BBB are defined in a sample space. Given P(A∪B)=0.9P(A \cup B) = 0.9P(A∪B)=0.9, P(A)=0.7P(A) = 0.7P(A)=0.7, and P(Ac∣Bc)=0.5P(A^c | B^c) = 0.5P(Ac∣Bc)=0.5, find P(B)P(B)P(B).
0.3
0.4
0.5
0.6